30pcs 41mm Copper Plate Piezoelectric Ceramic Disc for DIY Audio Systems Acoustic Sensor Microphone Pickup

High Precision & Reliable Performance 41mm copper disc piezoelectric ceramic disc; resonant frequency 6.0 ± 0.7 kHz; 35000 ± 6pF capacitance; operates between -20°C to 70°C; ideal for accurate sound and vibration detection in DIY audio systems; Easy Integration & Pre-Wired Design Pre-wired for quick installation; compatible with Arduino and Raspberry Pi; low power consumption 1.8 µA sleep mode; suitable for acoustic instrument pickups and contact microphones; Durable & Stable Material Construction Made from high-quality brass and ceramic; resistant to wear and tear; ensures long-term reliability; no calibration required; no drift issues reported in user testing; Flexible Voltage Range & Wide Compatibility Operates on 1.5V to 30V; works with multiple power sources; supports various DIY projects including drum triggers and homemade speakers; easy to integrate into custom circuits; Versatile Application for Makers & Beginners Perfect for touch sensors, acoustic pickups, and vibration detectors; ideal for box guitars, foot stompers, and experimental sound devices; enhances creative possibilities in audio and electronics projects